Plasma betatron without gas breakdown

Hiroshi Ishizuka; K. Yee; Amnon Fisher; Norman Rostoker

doi:10.1117/12.43519

1 April 1991 Plasma betatron without gas breakdown

Hiroshi Ishizuka, K. Yee, Amnon Fisher, Norman Rostoker

Proceedings Volume 1407, Intense Microwave and Particle Beams II; (1991) https://doi.org/10.1117/12.43519
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

1407_49Following Budker's proposal, experiments on plasma betatrons were carried out in several laboratories. Large conduction currents were observed as a result of gas breakdown, but the current of energetic electrons did not exceed 10 (Alpha) . Plasma injection to start a beam in good vacuum has been adopted. The chamber consisted of outer and inner glass pipes lined with stainless steel mesh at radii of 5 cm and 2 cm, respectively. A toroidal field of 2-3 kG was applied along with a vertical field of up to 1.4 kG. Plasma was injected by coaxial guns, 1/4 inch in outer diameter, without increasing the neutral pressure significantly. A 20 (Alpha) beam was accelerated to a peak energy of 1 MeV with little loss and then dumped to the chamber wall by a spiller field. The current was enhanced to more than 100 (Alpha) by the addition of electron injection using a field emission cathode.

Citation Download Citation

Hiroshi Ishizuka, K. Yee, Amnon Fisher, and Norman Rostoker "Plasma betatron without gas breakdown", Proc. SPIE 1407, Intense Microwave and Particle Beams II, (1 April 1991); https://doi.org/10.1117/12.43519

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